Identifying the best method for linearizing the nonlinear friction term to analyze the transient flow in pipeline systems

Mahshid Alsadat Mousavian; Mohammad Mehdi Riyahi; Ali Haghighi

Volume 9, Issue 2 , December 2022, , Pages 107-120

https://doi.org/10.22126/arww.2022.8069.1263

Abstract
  To analyze transient flows, continuity and momentum equations must be solved. Due to the non-linear friction term in the momentum equation, numerical methods such as method of characteristics (MOC) are used to analyze the problem in thetime domain. Although numerical methods are easy to use, but they ...  Read More

Evaluation of the SINTACS-LU model capability in the analysis of aquifer vulnerability potential in semi-arid regions

Mobin Eftekhari; Mohammad Akbari

Volume 7, Issue 2 , December 2020, , Pages 111-119

https://doi.org/10.22126/arww.2020.4785.1151

Abstract
  Detection of aquifer vulnerable areas can highlight preventive actions for groundwater contamination. Different models have been presented for the evaluation of vulnerability that one of the most regular and well-known models of the overlapping index as the SINTACS-LU (Soggiacence, actual infiltration, ...  Read More

A kinetic and thermodynamic study of methylene blue removal from aqueous solution by modified montmorillonite

Adeleh Afroozan; Ali Mohammad-khah; Farhad Shirini

Volume 2, Issue 2 , December 2015, , Pages 150-155

Abstract
  In current study, sulfonic acid-functionalized ordered nanoporous Na+-Montmorillonite (SANM) has been utilized as the adsorbent for the removal of a cationic dye, methylene blue (MB), from aqueous solution using the batch adsorption technique under different conditions such as temperature, adsorbent ...  Read More

Optimizing ANFIS for sediment transport in open channels using different evolutionary algorithms

Sultan Noman Qasem; Isa Ebtehaj; Hossien Riahi Madavar

Volume 4, Issue 1 , June 2017, , Pages 290-298

https://doi.org/10.22126/arww.2017.773

Abstract
  Flow through open channels can contain solids. The deposition of solids occasionally occurs due to insufficient flow velocity to transfer the solid particles, causing many problems with transfer systems. Therefore, a method to determine the limiting velocity (i.e. Fr) is required. In this paper, three ...  Read More

Benzene and MTBE removal by Fenton’s process using stabilized Nano Zero-Valent Iron particles

Ali Beryani; Alireza Pardakhti; Mojtaba Ardestani; Mohammad Ali Zahed

Volume 4, Issue 2 , December 2017, , Pages 343-348

https://doi.org/10.22126/arww.2017.788

Abstract
  A bench-scale study was designed for removal of Methyl Tertio Butyl Ether (MTBE) and benzene from south of Tehran groundwater. The experiments were implemented on a one-dimensional soil column with similar chemical and physical conditions of the region. Fenton’s chemical oxidation with stabilized ...  Read More

Combination of gradually varied flow theory and simulated annealing optimization in of manning roughness coefficient

Majid Heydari; Jalal Sadeghian; Saeid Shabanlou

Volume 5, Issue 1 , March 2018, , Pages 381-388

https://doi.org/10.22126/arww.2018.865

Abstract
  Manning roughness coefficient is one of the most important parameters in designing water conveyance structures. Unsuitable selection of this coefficient brings up some mistakes. This research aims to present a method to determine the Manning roughness coefficient based on a combination of optimization ...  Read More

Optimization of adsorption removal of ethylene glycol from wastewater using granular activated carbon by response surface methodology

Behnaz Jalili; Seyed Mehdi Borghei; Vahid Vatanpour; Christopher Sarkizi

Volume 5, Issue 2 , December 2018, , Pages 421-430

https://doi.org/10.22126/arww.2018.982

Abstract
  Wastewater reuse has been attracted a lot of attention in recent years especially in places with low water availability. The effluents that were considered to be discharged are now could be used as potential sources of reusable water. In this study, variables affecting the removal of ethylene glycol ...  Read More

Removal, preconcentration and determination of methyl red in water samples using silica coated magnetic nanoparticles

Masoud Shariati-Rad; Mohsen Irandoust; Somayyeh Amri; Mostafa Feyzi; Fattaneh Ja’fari

Volume 1, Issue 1 , March 2014, , Pages 6-12

Abstract
  A method was developed for removal, preconcentration and spectrophotometric determination of trace amounts of methyl red based on SiO2-coated Fe3O4magnetic nanoparticles. The influence of pH, dosage of adsorbent and contact time on the adsorption of dye was explored by central composite design. The kinetic ...  Read More

Developing a semi-distributed decision support system for great Karun water resources system

Seyed Mohammad Ashrafi; Maral Mahmoudi

Volume 6, Issue 1 , January 2019, , Pages 16-24

https://doi.org/10.22126/arww.2019.1042

Abstract
  In this study, water resources system of Great Karun watershed is modelled as a semi-distributed system considering the diversity of demand sites downstream of Olya Gotvand and Dez reservoirs in southwest of Iran. The main aim of the present study is to develop a basin's decision-support system to assist ...  Read More

Effects of side orifice dimensions on characteristics of flow field in rectangular channels

Babak Sanahmadi; Majeid Heydari; Saeed Gohari; Saeid Shabanlou

Volume 9, Issue 1 , June 2022, , Pages 16-22

https://doi.org/10.22126/arww.2020.4916.1156

Abstract
  In this paper, the flow in the vicinity of rectangular side orifices placed in main channels is estimated by means of the FLOW-3D model. To reconstruct the flow free surface, the volume of fluid (VOF) approach is utilized. In addition, the standard k-ε and RNG k-ε turbulence models are ...  Read More

Optimization of ANFIS model using wavelet transform for simulating groundwater level variations

Fariborz Yosefvand; Saeid Shabanlou

Volume 7, Issue 1 , June 2020, , Pages 23-29

https://doi.org/10.22126/arww.2020.4150.1123

Abstract
  In this study, for the first time, groundwater level (GWL) variations of the Sarab-e Qanbar well located in the city of Kermanshah, are simulated over a 13-year period by a hybrid model named WANFIS (wavelet-adaptive neuro fuzzy inference system). In order to develop the hybrid model, the wavelet transform ...  Read More

Implementation of the skyline algorithm in finite-element computations of Saint-Venant equations

Reza Karimi; Ali Akbar Akhtari; Omid Seyedashraf

Volume 1, Issue 2 , June 2014, , Pages 61-65

Abstract
  Solving a large sparse set of linear equations is of the problems widely seen in every numerical investigation in the entire range of engineering disciplines. Employing a finite element approach in solving partial derivative equations, the resulting stiffness matrices would contain many zero-valued elements. ...  Read More

Multi-objective optimization of water scheduling in irrigation canal network using NSGA-II

Elham Darvishi; Tayebeh Kordestani

Volume 6, Issue 2 , July 2019, , Pages 95-99

https://doi.org/10.22126/arww.2020.1358

Abstract
  The objective of distribution and delivery of water canal scheduling in irrigation canal networks is timely and adequate delivery of water with minimum operational stages of the head gate of supply canal in the presence of canal capacity and irrigation rotation period constraints. In this paper, two ...  Read More

Investigation of leak detection systems for saltwater transmission lines

Mohammad Reza Boroomand; Nasim Safar Razavi; Ahmad Eshghi

Volume 8, Issue 2 , December 2021, , Pages 107-112

https://doi.org/10.22126/arww.2021.5973.1198

Abstract
  The use of a proper leak detection system in pipelines is of crucial importance in water transmission systems. In these methods, we should consider the time and accuracy of leak detecting procedure for preventing energy loss and reducing environmental impacts. In these days, seawater transmission lines ...  Read More

Removal of eosin Y and eosin B dyes from polluted water through biosorption using Saccharomyces cerevisiae: Isotherm, kinetic and thermodynamic studies

Nader Bahramifar; Maryam Tavasolli; Habibollah Younesi

Volume 2, Issue 1 , March 2015, , Pages 108-114

Abstract
  Biosorption of two anionic dyes, eosin Y and eosin B, from aqueous solution using Saccharomyces cerevisiae was investigated in a batch mode. The influence process parameters such as contact time, initial dye concentration, sorbent dosage, pH and temperature of aqueous solution were studied. The maximum ...  Read More

Simulation of hydraulic jump length on sloping coarse floors adopting extreme learning machine

Amir Hosein Azimi; Saeid Shabanlou; Behrouz Yaghoubi

Volume 7, Issue 2 , December 2020, , Pages 120-126

https://doi.org/10.22126/arww.2020.4427.1138

Abstract
  In this paper, the hydraulic jump length on a slope rough floor is simulated through the extreme learning machine (ELM). Then, the parameters affecting the hydraulic jump on the slope rough bed are detected. After that, five different ELM model are developed so as to determine the influenced factor. ...  Read More

Monitoring and assessment of water quality in Tehran city using physicochemical and microbial indexes

Marjan Nouri; Amirsalar Montazer Faraj

Volume 9, Issue 2 , December 2022, , Pages 121-124

https://doi.org/10.22126/arww.2022.7066.1229

Abstract
  Drinking water is one of the main factors for health maintenance and sustainable development of communities and its quantity and quality are so important. The aim of present study is random sampling of drinking water in 30 regions of Tehran city during 2 months in summer of 2020 to determine physicochemical ...  Read More

Combination of ozonation with aerobic sequencing batch reactor for soft drink wastewater treatment: experiments and neural network modeling

Negar Amiri; Mojtaba Ahmadi; Meghdad Pirsaheb; Yasser Vasseghian; Pegah Amiri

Volume 2, Issue 2 , December 2015, , Pages 156-163

Abstract
  In this study, ozone combination with a sequencing batch reactor was tested in laboratory scale for treating a soft drink wastewater characterized by high concentrations of chemical oxygen demand (COD). A bench scale aerobic sequencing batch reactor (SBR) is carried out by two stages. The system was ...  Read More

Mean flow characteristics, vertical structures and bed shear stress at open channel bifurcation

Akbar Safarzadeh; Babak Khaiatrostami

Volume 4, Issue 1 , June 2017, , Pages 299-304

https://doi.org/10.22126/arww.2017.774

Abstract
  Water supply from rivers is accomplished with flow diversion through an intake structure. A lateral intake like bifurcation is the simplest method to withdraw water. However, flow at a channel bifurcation is turbulent, highly three-dimensional (3D) and so has many complex features. This paper reports ...  Read More

Virtual water strategy and its application in optimal operation of water resources

Mohammad Hossein Karimi Pashaki; Amir Khosrojerdi; Hossein Sedghi

Volume 4, Issue 2 , December 2017, , Pages 349-353

https://doi.org/10.22126/arww.2017.790

Abstract
  The water used in the production process of an agricultural or industrial product iscalled "virtual water". In Iran with low average annual precipitation also lack ofavailable water resources, concept of the virtual water and its trade is used as astrategy for optimal operation of water resources in ...  Read More

PHA production from wastewater by mixed microbial culture under short-term microbial enrichment

Farinaz Ahmadi; Ali Akbar Zinatizadeh; Azar Asadi

Volume 5, Issue 1 , March 2018, , Pages 389-391

https://doi.org/10.22126/arww.2018.863

Abstract
  In this research, the possibility of polyhydroxyalkanoates (PHAs) production in a mixed microbial culture fed by industrial soft drink wastewater was assessed. To enrich the microbial culture, an uncoupled carbon and nitrogen feeding strategy were used in sequencing batch bioreactor (SBR). To evaluate ...  Read More